Air or gas compressor.



T. D. BERKELEY.

AIR 0R GAS COMPRESSOR.

APPLICATION FILED DEC. I8. I914.

Patented Dec. 26, 1916.

WWA/6555; @2W im T. D. BERKELEY.

MR GR GAS C'GrPRESSGFI, PPUCATIOR .FIEEE DEC. '28; SSM,

Patented Dec. 2e, 1916.

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AIR 0R GAS COMPRESSOR.

APPLICATION man ofc. 1a. 1914.

1,209,930. Patented Dec. 26,1916.

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T. D. BERKELEY.

AIR 0R GAS COMPRESSOR. APPucAnoN man nec. 18, 1914.

1 ,209,930 Patented Dec. 26, 1916.

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T. D. BERKELEY,

AIR 0H GAS CMPRESSOB.

APPLICATION FILED DEC.18,1914.

l 929,939., Patented Bec. 26, w16.

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lilhllflii@ STATE@ TYRUS DOUGLAS BERKELEY, OF RUABON, WALES.

AIR OR GAS COMPRESSOR.

Specicaton of Letters Patent.

Patented Dec. 26, 13165.

Application led December 18, 1914. Serial No. 877,944.

To all whom t may concern:

Be it known that l, TYRUs DOUGLAS BERKELEY, a subject of the King ofEngland, residing at Clifton, Ruabon, in the county of Denbigh, NorthWales, United Kingdom ci Great Britain and ireland, have invented newand useful Improvements in Air or Gas Compressors, of which thefollowing is a speciiication.

rihis invention has reference to air or gas compressors, and moreparticularly to those ci' the high speed type having a reciprocatingsleeve valve between the cylinder and the piston or plunger; and it hasfor its object, to provide a compressor of the type which can be run atrelatively very high speed without ar or knock, and without waste ofenergy or loss of etliciency through choking of the inlet or outlet, orimpediment or discharge and inlet, and which is simple and inexpensive,and possesses a positive method of operating.

The improved air or gas compressor, constituting this invention, isillustrated in the accompanying drawings, and itf-the invention-will bedescribed in connection with In these drawings, Figure 1 is alongitudinal sectional elevation of the compressor showing the air orgas inlet port in section; and Fig. 2 is an end view of the compressorpartly in section, the section being through about the center of thedelivery port of the cylinder; the supply and delivery pipe portconnecting branches being arranged on the cylinder jacket at about 90degrees from one another. Fig. 3 is a plan in section taken in the planeof the air and gas inlet port; and Fig. d is a plan in section taken inthe plane ot the delivery port; and Fig. 5 is a view showing the caniand parts operated by it for actuating the valve of the compressor,Figs. 6, 7, and 8, are respectively, vertical sections taken in theplanes of the inlet port ot the cylinder, and the delivery port; and aplan in section through the latter port, showing a modiiied arrangementin which the sleeve valve is operated by an eccentric or crank.

Referring to the drawings, 1 generally designates the cylinder of thecompressor, which is provided with a jacket and water cooling space 2,and a water-cooled hollow cover 3.

d is the base or body oi the compressor,

which in the case shown is cast in one with the cylinder 1; and 5 is thecrank shaft.

6 is the piston; 7 is the rod connecting the crank of the crank shaftdirectly with the piston, which is of hollow trunk form; and 8 is theair or gas inlet and delivery controlling valve. This valve 8 is ofsleeve form as shown, fitting in between the wall of the cylinder 1, andthe piston 6, and the portion of the hollow cover 3 which depends intothe upper portion of the cylinder 1; the annular space between which isfilled by this sleeve valve.

rlhe compressing cylinder 1 has an inlet port 10 at a certain level,extending around the greater portion of the cylinder, as seen in Fig. 3;and a delivery port 12 at a higher level in the cylinder than the port10, and extending a substantial distance around the cylinder, as shownin Fig. l; and these ports 10 and 12 are respectively provided withianges or ifacings 11 and 13, to which, as may be required, suitablepipes or conduits can be attached for conducting air or gas tothecompressorwhere desired, and carrying it away.

rlhe sleeve valve 8 is provided with ports 15 in it at a certain heightand position; and it is so arranged in relation to the end of thecylinder; and the inlet and delivery ports 10 and 12 of the cylinder areso arranged and disposed, as to put these ports at the required periodsinto communication with the interior of the cylinder, and at other timescut them out of communication. rihese ports, as well as the cylinderports 10 and 12, are preferably ot grid form, as seen.

The'sleeve valve 8 shown in Figs. 1 to -l is combined with, and operatedby cams 1G Xed on the crank shaft 5, and these cams are so formed, andthe inlet and discharge ports 10 and 12, and the valve ports 15, so

arranged in relation to each other, that the valve ports 15 will beopposite the inlet port 10, and communicating with it and the interiorof the cylinder during the outstroke of the piston 6; but suchcommunication will be cut oft during the return stroke. And at theperiod at which the pressure in the compressor cylinder reaches that ofthe delivered air under compression, they-the ports 15-will be incommunication with the discharge or delivery port 12. And then at theend of the inward stroke ot the piston 6, this sleeve valve 8 will havemoved down,

say into theY position shown `inFig. 2; and communication between theinterior of the cylinder and the port 12 will be closed.

The position given in Fig. 1 shows the sleeve valve ports 15 at thepoint of opening to the inlet port 10 just at or slightly subsequent tothe end of the inward stroke of the piston 6. Y

Both cams 16 act to move the valve 8 up, acting on bowls 18; but one ofthe cams 6 has another part, as shown, which acts on a bowl 2O on thebottom of a carrier ring 19; and this vpart moves the sleeve valve down.

The sleeve valve 8, extends in the case shown, from one end to the otherof the cylinder; and as stated, into an annular space between thedepending portion of the cover 3, which is hollow and water lined, andthe upper part of the wall'of the cylinder; and the sleeve, therefore,constitutes, as lit were, a cylinder liner, aswell as a valve to it; andby the arrangement of cams, as shown and described on each side of thevalve for working it up, pressure upward is direct and equallydistributed.

lThe piston 6 has suitable packing rings in it for making Huid tightjoints Vbetween itself and the inside of the sleeve 8.

In a pump or compressor of this kind, the clearance need be very small,and consequently loss of efficiency through this cause, can be kept verylow.

With regard to the modification shown in Figs. 6 to 8, in this case, itis assumed that the sleeve valve 8 is operated by eccentrics or cranks,say on a crank shaft or a plurality of same in which case the valveports 15 will be in communication with the cylinder discharge port 12,when the piston 6 begins its upstroke; and in such a case, to prevent areflux of compressed air or gas into the cylinder from the compressedair delivery pipe or main, a non return valve 22 (or valves) is providedon this port so that communication is out off between the cylinderdelivery branch 18 until the vpressure rises in the cylinder, due to theVupward movement'of the piston, sufficiently high to open the non returnvalve; and allow the compressed air or gas, to be delivered into thedelivery pipe. The piston on reaching the top of the cylinder, reversesand commences to move downward and the non-return valve closes and inaddition to this the portsv 15 in the sleeve valve will also have cutofi'I communication between the cylinder and the port 12. 1n such a casewhere the sleeve valve 8 is operated by ecoentrics or cranks, and theypoint of delivery of compressed air in the compressing stroke, andentrance of air to the cylinder tween a stationary cylinder wall and amoving piston, havinga single set of ports 15 which are adapted tocommunicate with the cylinder, and alternately with separate air or gasinlet and discharge ports 10, l2 in the cylinder directly above orbeyond one another; substantially as set forth.v c

2. Inanair or gas compressor of the type herein referred to, thecombination of a sleeve 8 having a single set of ports 15 in it; acylinder having an inlet port 10, belowA 'or within the end of thecylinder and a delivery port 12'over or beyond the end, said ports'beingdirectly over or'beyond one another in parallel planes, and the saidsingle set of yports 15 being adaptedto communicate, Y*

permanently with the interior of the cylinder, and alternately with theinlet port 10, and with the delivery port 12; substantially asdescribed.

8. An air or gas compressor comprising a A cylinder having an inletport, and a discharge port fitted with a non-return valve, the inlet anddischarge ports being above or beyond one another; a sleeve valvedisposed within the cylinder and having a sin-c gle set of ports whichcommunicate with the' interior and alternately communicate with theinlet and discharge ports; and a piston which operates within thesleeve; substantially as described.

l. An air or gas compressor, comprisingVv a cylinder having an inletport near its end and a discharge port beyond the inlet port; a sleevevalve disposed within the cylinder, and reciprocated positively in each.

direction by cam mechanism and having a set of ports through which theinlet and exhaust occur, the same ports which communicate with thedischarge communicating with the inlet alternately; and a pistondisposed within the sleeve valve.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

TYRUS DOUGLAS BERKELEY.

Witnesses:

W. HOLDEN, S'IMEON JOHN RENDELL.

Copies of this patent may be obtained for ivev cents each, by addressingthe Commissioner of Patents. Y Washington, D. G.

